WARNING
LAMPS
TREAD
LAMP
| -
|
Tire Under Inflation / Leak
Warning.
|
| 1. |
Turn on condition
| A. |
When tire pressure is below allowed
threshold. |
| B. |
When rapid leak is detected by the
sensor. |
| C. |
Indicates that tire needs to be
re-inflated to placard pressure /
repaired. | |
| 2. |
Turn off condition
| A. |
Under-inflation ; When tire pressure
is above (warning threshold +
hysteresis). |
| B. |
Rapid Leak ; When tire pressure is
above (leak warning
threshold). | |
TIRE
LOCATION LAMP
In a high line system
the tire location lamp associated with a tire fault will
illuminate.
DTC
WARNING
| 1. |
Turn on condition
| A. |
When the system detects a fault that
is external to the receiver/
sensor. |
| B. |
When the system detects a receiver
fault. |
| C. |
When the system detects a sensor
fault. | |
| 2. |
Turn off condition
| A. |
If the fault is considered as
'critical', then the lamp is held on throughout the current
Ignition cycle (even if the DTC has been demoted). This is
because it is important to bring the problem to the drivers
attention. On the following Ignition cycle, the demotion
conditions will be re-checked. If the demotion conditions
occur, the lamp will be turned off. It will be held on until
DTC demotion checking is
completed. |
| B. |
'Non critical' faults are those that
can occur temporarily e.g. vehicle battery under voltage. The
lamp is therefore turned off when the DTC demotion condition
occurs. | |
SYSTEM
FAULT
| 1. |
General Function
| A. |
The system monitors a number of inputs
across time in order to determine that a fault
exists. |
| B. |
Faults are prioritized according to
which has the most likely
cause. |
| C. |
Certain faults are not covered through
DTC. The main ones are: |
| 1) |
Control module Micro-controller
lock up ; requires observation of lamps at Ignition ON
to diagnose. |
| 2) |
Ignition Line stuck ; requires
observation of lamps at Ignition ON to
diagnose. | | |
